I am sure, Indiavision wont be there in their list in few months. Once they ask the carriage fee, they wont be able to give that. Same happened with Dishtv and Tata Sky
. If you really worried about all malayalam channel, get an stb of sundth from kerala or near to your place (if it is available) and get some local guy to get it fixed.
In BigDTH, you cant expect the shalom and jeevantv for long. Dishtv removed jeevantv one fine morning.
They wont put those channels which are having less viewership (shalom) for long !
They may charge those channels where there are lots of viewership (indiavision/asianet news)
I guess, SunDTH suits best for you
i read that bigtv is not charging carrige fees. so hope it will stay.